Petrography of the Middle Pennsylvanian Upper Elkhorn No. 3 Coal of Eastern Kentucky, U.S.A.

  1. R. A. Rahmani and
  2. R. M. Flores
  1. Eric J. Trinkle and
  2. James C. Hower

Published Online: 28 APR 2009

DOI: 10.1002/9781444303797.ch20

Sedimentology of Coal and Coal-Bearing Sequences

Sedimentology of Coal and Coal-Bearing Sequences

How to Cite

Trinkle, E. J. and Hower, J. C. (1985) Petrography of the Middle Pennsylvanian Upper Elkhorn No. 3 Coal of Eastern Kentucky, U.S.A., in Sedimentology of Coal and Coal-Bearing Sequences (eds R. A. Rahmani and R. M. Flores), Blackwell Publishing Ltd., Oxford, UK. doi: 10.1002/9781444303797.ch20

Author Information

  1. University of Kentucky, Institute for Mining and Minerals Research, P.O. Box 13015, Iron Works Pike, Lexington, Kentucky 40512, USA

Publication History

  1. Published Online: 28 APR 2009
  2. Published Print: 26 MAR 1985

ISBN Information

Print ISBN: 9780632012862

Online ISBN: 9781444303797

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Keywords:

  • petrography of the middle Pennsylvanian Upper Elkhorn no. 3 coal - eastern Kentucky;
  • Upper Elkhorn no. 3 coal - heavily-mined coal in Eastern Kentucky Coal Field;
  • high-temperature ash, total sulphur, and forms of sulphur were determined for Upper Elkhorn no. 3;
  • Vitrinite reflectance data, showing overall NW-SE coal

Summary

Coal rank, maceral composition, ash and sulphur content were determined for 62 channel and borehole samples of the Upper Elkhorn no. 3 coal (Middle Pennsylvanian Breathitt Formation (Westphalian B)) of eastern Kentucky. Regional rank trends show an overall increase in rank from high volatile C bituminous in the NW to high volatile A bituminous rank in the SE, but overprinted on the primary rank trend are several high rank anomalies. The high rank overprints occur near specific structural features, suggesting that tectonic forces responsible for the present-day structures, active during post-deposition and possibly syn-depositional time, influenced coalification of the Upper Elkhorn no. 3 coal. The vitrinite maceral group usually comprises > 70% of coals, but relatively lower vitrinites, and concomitant higher inertinites, are found in the vicinity of two high rank overprints, suggesting that structural mechanisms affecting Breathitt coals in post-depositional time may also have been affecting actual peat formation during Breathitt time. Average ash content is 7.7%, with values usually ranging from 4 to 8%. Total sulphur values range from 0.6% to 5.0%, with the average for all samples being 1.7%. Ash and sulphur trends and possible relationship of trends to petrographic characteristics are not readily apparent.